/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/PreviewMesh.h
Enable automatically-computed decomposition of internal mesh into subregions when rendering (ie inside the Component). This allows for faster local updates viaNotifyRegionDeferredEditCompleted()functions above. Decomposition will be automatically recomputed as necessary when internal mesh is modified via changes, edits, etc
virtual void SetEnableRenderMeshDecomposition ( bool bEnable )